Lady Gaga, Robert Pattinson Dubbed "Most Influential" By Time Magazine

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A number of Hollywood's leading men and women have made their way onto the Time 100, the magazine's annual list of the year's most influential people.

Amongst them was Lady Gaga, whose music – and record-breaking YouTube videos – have taken the world by storm.

"When I see somebody like Gaga, I sit back in admiration," Cyndi Lauper wrote of the already iconic singer in the new issue, which hits newsstands on Friday. "I'm inspired to pick up the torch again myself. I did an interview with her once, and she showed up with a sculpture on her head. I thought, 'How awesome.'"

Besides Gaga, a number of musicians made the list, including Prince, Elton John and Taylor Swift, who earned kudos from Fleetwood Mac legend Stevie Nicks, who performed with Taylor at this year's Grammy Awards.

"Taylor reminds me of myself in her determination and her childlike nature. It's an innocence that's so special and so rare," Stevie wrote. "This girl writes the songs that make the whole world sing, like Neil Diamond or Elton John. I still walk around singing her song 'Today Was a Fairytale.'"

"We haven't seen a tenth of what he can do onscreen," "The Twilight Saga: New Moon" director Chris Weitz wrote of his star. "I love you, Rob! Call me!"

Also on the list was new mom Sandra Bullock, finally an Oscar winner this year for her role in "The Blind Side."

"She puts you at ease; there's no movie star there at all. Well, she happens to be a bit beautiful, I'll grant, and a bit built, but the human being inside all that gorgeousness is just a delight," "The Proposal" co-star Betty White wrote of Sandra. "She's been labeled America's Sweetheart, which sounds soft and sweet. Sandra is both of those things, but she also has a strength of her own. She never lets a scene get away from her. She's never just there going through her paces. And you can't take your eyes off of her. America, you wish she were your sweetheart."

Conan O'Brien, who gave up his spot at "The Tonight Show" (and is now heading for a new show on TBS) after unprecedented drama in the comedy-minded world of late night, joined the top 100 as well.

"He wasn't a performer; he was a writer," George Lopez, Conan's soon-to-be TBS colleague, wrote of the comedian's early days in late night. "But then I watched, and I recognized his unique perspective. He said things that made me laugh, and I started to feel him. He kept fighting — and I started to respect him. In the world of comedy, his was a Cinderella story in size 15 shoes."

Even a Twitter star made the list – Ashton Kutcher, the social network site's most popular person, as well as a longtime film and TV star.

"Most people use it to promote themselves, but he uses Twitter to connect, to strike up conversations, to send positive messages to the millions of people who read his words. This guy will show us the future. And it's gonna be a blast," Sean "Diddy" Combs, a friend of Ashton since his "Punk'd" days, wrote.